Misalignment correction pattern formation method and misalignment correction method
US7443535B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2003 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Dec 6, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/2135
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A misalignment correction method for forming a plurality of color images on a transfer belt to form a multi-color image and correcting a misalignment of each color using a detection sensor, including forming a patch by superposing a reference pattern as a last color to be superposed on a color pattern to be corrected, preparing a plurality of patches, arranging the plurality of patches on the transfer belt, optically detecting a value of each of the patches with respect to the shift quantity of the respective patches of the continuously formed patch group in the correction pattern, calculating an intersection point of two approximate lines as output obtained on opposite sides of an inflection point of the two lines, and performing misalignment correction based on the intersection point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.